Bidirectional energization explosion-propagating device

Abstract

The invention discloses a bidirectional energization explosion-propagating device, belonging to the field of blasting supplies for oil and gas wells. The explosion-propagating device includes a clapboard with a symmetrical explosive loading structure, a clapboard coat with an explosion-expanding hole and a clapboard fixing member with an explosion-expanding hole, wherein explosion-expanding tubes and detonators in parallel with each other are installed at two ends of the clapboard, high explosive is filled in the explosion-expanding tubes in a pressing manner, initiating explosive filled in the clapboard is transmitted to the explosion-expanding tubes through the high explosive, the clapboard is positioned between the clapboard coat and the clapboard fixing member, and the two explosion-expanding tubes are respectively aligned to the two explosion-expanding holes. According to the bidirectional energization explosion-propagating device, any one of the two ends can integrate the dual effects of high initiating sense degree and strong initiating ability, and the problem of bidirectional energization explosion-propagating in traditional oil and gas well perforations is solved; not only the success rate of first-time downhole perforating is improved, but also the construction cost is saved; and simultaneously the bidirectional energization explosion-propagating device has the advantage of more convenience and more safety for use.

Description

technical field [0001] The invention relates to a blasting equipment for oil and gas wells, in particular to a two-way energy-increasing explosion-transmitting device. Background technique [0002] In the perforation of oil and gas wells, in order to improve the construction efficiency, it is usually required to go down the well with multiple perforating guns (ranging from dozens to hundreds of guns) to shoot through all the target layers. All the perforating guns are connected in series through the joint gun joint to form a perforating gun string of hundreds of meters or even thousands of meters. Each section of the perforating gun achieves the purpose of perforating by detonating the detonating cord and detonating the perforating charge. [0003] U.S. Patent USP 4616566 discloses a method of martyrdom between the perforating gun and the perforating gun with two bidirectional detonating tubes that only contain high explosives, that is, the two ends of the detonating cord i...

AI Technical Summary

Problems solved by technology

Since the perforation of oil and gas wells can only adopt the axial detonation transmission method, it is impossible to simply combine the composite detonation tube in ZL 02262272.1 and the energizer in CN 201531258 U to realize bidirectional energization and detonation transmission

In addition, in the above two patents, the priming charge of the composite booster or the ignition charge (sensitive agent) in the energizer is located in the axial position of the blasting hole of the coupler joint, which cannot be effectively protected, and there is a risk of accidental ignition. safety hazards, which also limits its widespread use

Although the isolated explosion transfer device in the patent ZL 01267493.1 has the function of two-way explosion transfer, because its sensitive charge (priming charge) is at the bottom of the partition and is covered by insensitive charge (high explosive), the detonation sensitivity is poor. In aspect, it is similar to a traditional two-way squib, without the effect of energization

Due to the long string of perforating guns and high well temperature in oil and gas wells, it is usually required to detonate from different directions at both ends of the perforating gun string to ensure the success rate of one perforation. Obviously, the above two patents and some domestic and foreign Similar products cannot meet the requirements of oil and gas well perforation for two-way energy boosting and explosion transmission

So far, in the axial detonation sequence, there has not been a technical solution that balances detonation energization and bidirectional detonation transmission

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